JPH0577604A - Caster interlock operation system for both motor-driven and manual operation - Google Patents

Abstract

PURPOSE:To lock and unlock a wheel by motor-driven operation in addition to a footstep type operation means. CONSTITUTION:A lock operation plate 4 is installed free to revolve on a revolving shaft 18 of a lock system 13 in one of casters 2 capable of interlocking with each other. An engagement pin 6 to interlock a working arm 5 by way of making contact with the working arm 5 is provided on the lock operation plate 4, and a motor-driven operation system 7 to oscillate the lock operation plate 4 is connected to it. Additionally, a footstep type operation means 9 is connected to the revolving shaft 18 of one of the casters 2. The motor-driven operation system 7 is furnished with a rotary member 11 through an interlocking bar 10 on the lock operation plate 4 and a motor 12 connected to it through this rotary member 11. In this way, as it is possible to lock and unlock all the casters by both of the motor-driven and manual means, operativity is remarkably improved, and even in the case of emergency, it has a big advantage to cope with it sufficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caster interlocking lock operation mechanism for electric / manual operation which has improved operability.

[0002]

2. Description of the Related Art For example, many casters for movement, which are mounted on the legs of a bed or the like, have a lock mechanism. That is, the lock mechanism includes a braking piece that abuts on the wheel to lock the wheel, an operating rod that presses the braking piece against the wheel, and a cam member that presses the operating rod. The stepping operation means is attached to the rotating shaft of the.

[0003]

According to such a stepping type, when the actuating rod is actuated to lock the wheels, the stepping operation of the stepping type operation means provided on each caster is performed. When releasing, the stepping operation means must be operated to lift it upside down, or conversely, the operation means must be provided to return the stepping operation means. The present invention has been made in view of the above-mentioned problems, and provides a caster interlocking lock operation mechanism for electric / manual use which is capable of electrically locking and unlocking wheels in addition to the stepping operation means. With the goal.

[0004]

In order to solve the above-mentioned problems, the present invention relates to a braking piece that comes into contact with a wheel, an operating rod for pressing the braking piece against the wheel, and a spring force for the operating rod. In a caster such as a bed provided with a lock mechanism composed of a cam member for pressing against each other, a stepping operation means is attached to the rotation shaft of the cam member of one of the casters, and the cam of each caster is attached. The operation arms are attached to the rotation shaft of the member so that the operation arms can be interlocked with each other, and one of the casters is provided with a lock operation plate so that the cam member can rotate about a single point. A lock pin is attached to the shaft, and a lock operation plate is provided with an engaging pin for rotating the lock operation plate so that the lock operation plate comes into contact with the operation arm to interlock the operation arm. It is characterized in that to connect the work mechanism. Further, the electric operating mechanism attaches one end of the interlocking rod to the lock operating plate, attaches the other end of the interlocking rod to a point on the circumferential portion of the rotating member, and connects the rotating member to the output shaft of the motor. It is characterized in that it is configured to.

[0005]

When the motor is driven to lock the caster, the rotating member rotates, the interlocking rod moves and moves, and the lock operating plate rotates about the rotating shaft of the cam member.
Then, the engagement pin of the lock operation plate comes into contact with and presses the operating arm, so that the operating arm is displaced and the rotation shaft of the cam member is rotated. As a result, the lock mechanism operates to lock the wheels. At that time, the displacement of one working arm is transmitted to the remaining working arms, and all casters are locked. To unlock, drive the motor further and
Rotate the rotating member. The interlocking rod presses the lock operating plate until the rotating member reaches a half turn, so the operating arm is pressed via the engaging pin of the lock operating plate, and the caster is in the locked state, but When the rotation is exceeded, the interlocking rod is pulled in reverse by the rotating member, so that the lock operation plate is pulled in at the same time and the operating arm is displaced in the opposite direction via the engaging pin. Therefore, the rotation shaft of the cam member rotates and the lock is released.

Further, by operating the stepping operation means, it is possible to displace the operating arm and lock all casters by the interlocking shaft.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric / manual caster interlocking lock operation mechanism according to the present invention will be described below with reference to the accompanying drawings. In FIG.
Reference numeral 1 indicates a base frame such as a bed to which a caster interlocking lock operation mechanism for both electric and manual is applied, and a caster 2 having a lock mechanism described later is attached to an end portion of the base frame 1.

The caster interlocking lock operation mechanism 3 applied to the base frame 1 is constructed as follows.
That is, the caster interlocking lock operation mechanism 3 is the rotation shaft of the cam member, which is the operation shaft of the lock mechanism of one caster 2.
It has a substantially triangular lock operation plate 4 and an actuating arm 5 which are pivotally attached to (described later). As shown in FIG. 2, the lock operation plate 4 is pivotally attached to a rotation shaft in the vicinity of one corner, and is engaged with the operation arm 5 in the vicinity of the remaining corner so as to interlock the operation arm 5. A pin 6 is implanted and an electric operation mechanism 7 for swinging the lock operation plate 4 is connected. The operating arm 5 is motively connected to the operating arm 5 of the caster 2 on the other side in the longitudinal direction of the base frame 1 by an interlocking shaft 8. Further, the actuating arm 5 is connected to a stepping operation means 9 on the rotary shaft of one of the casters 2.

In the electric operating mechanism 7, one end portion of the interlocking rod 10 is attached to the lock operating plate 4, and the other end portion is attached to one point of the circumferential portion of the rotating member 11.
Is connected to the output shaft of the motor 12 via an appropriate speed reducing means.

Here, the lock mechanism 13 provided on the caster 2 will be described. As shown in FIG. 3, the lock mechanism 13 is a braking piece 15 that comes into contact with a wheel 14 forming the caster 2, and the braking piece 15. It is provided with an operating rod 16 for pressing the wheel 14 against the wheel 14, and a cam member 17 for pressing the operating rod 16 against the spring force. Then, as described above, the rotation shaft 18 of the cam member 17 is
The lock operation plate 4 and the actuating arm 5 are coaxially attached thereto (see FIG. 4).

The caster interlocking lock operation mechanism 3 according to the present invention is constructed as described above. Next, its operation will be described. When the motor 12 is driven to lock the caster 2, the rotating member 11 rotates, the interlocking rod 10 displaces, and the lock operating plate 4 swings around the rotating shaft 18 of the cam member 17. (See Figure 5a). Then, the engaging pin 6 of the lock operation plate 4 abuts and presses the operating arm 5, so that the operating arm 5 is displaced and the rotation shaft 18 of the cam member 17 rotates. As a result, the lock mechanism 13 operates to lock the wheels 14 (see FIG. 5b). At that time, the displacement of the operating arm 5 is transmitted by the interlocking shaft 8, and all the casters 2 are locked.

Next, to release the lock, the motor 12
Is further driven to rotate the rotating member 11. The interlocking rod 10 presses the lock operating plate 4 until the rotating member 11 reaches a half rotation, so that the operating arm 5 is pressed and is in the locked state.
Is pulled in reverse by the rotating member 11, so
(See FIG. 5c), the lock operation plate 4 is pulled in at the same time, and the operating arm 5 is displaced in the opposite direction via the engaging pin 6. Therefore, the rotation shaft of the cam member 17 rotates and the lock is released (see FIG. 5d). Further, when the stepping operation means 9 is operated (see FIG. 5e), the actuating arm 5 is displaced and transmitted to all the casters 2 by the interlocking shaft 8, and all the casters 2 can be locked (see FIG. 5f). ).

As described above, the lock mechanism 13 of the caster 2 is used.
Can be locked and unlocked by the electric operation mechanism 7 and the stepping operation means 9, and by operating these operation means, it can be transmitted to all casters 2. Therefore, it is not necessary to individually lock the casters 2 individually, which saves time and effort, and the operability is significantly improved.

[0014]

As described above, according to the present invention, all casters can be locked and unlocked by both electric and manual means, so that the operability is remarkably improved, and even in an emergency, it is sufficient. There is a big advantage that it can correspond to.

[0015]

[Brief description of drawings]

FIG. 1 is a side explanatory view showing an embodiment of a bed base frame to which a caster interlocking lock operation mechanism for both electric and manual use according to the present invention is applied.

2 is a side explanatory view showing an example of a caster interlocking lock operation mechanism shown in FIG. 1. FIG.

3 is a cross-sectional explanatory view showing an example of a lock mechanism of the caster shown in FIG.

FIG. 4 is a structural explanatory view of the lock mechanism of the caster shown in FIG. 3 viewed from another direction.

FIG. 5a is a view for explaining the operation of the electric / manual combined caster interlocking lock operation mechanism according to the present invention.

FIG. 5b is a view for explaining the action of the electric / manual combined caster interlocking lock operation mechanism according to the present invention.

FIG. 5c is a view for explaining the action of the electric / manual combined caster interlocking lock operation mechanism according to the present invention.

FIG. 5d is a view for explaining the action of the electric / manual combined caster interlocking lock operation mechanism according to the present invention.

FIG. 5e is a view for explaining the action of the electric / manual combined caster interlocking lock operation mechanism according to the present invention.

FIG. 5f is a view for explaining the action of the electric / manual combined caster interlocking lock operation mechanism according to the present invention.

[Explanation of symbols]

1 base frame 2 caster 3 caster interlocking lock operating mechanism 4 lock operating plate 5 operating arm 6 engaging pin 7 electric operating mechanism 8 interlocking shaft 9 stepping operation means 10 interlocking rod 11 rotating member 12 motor 13 locking mechanism 14 wheel 15 braking piece 16 Actuating Rod 17 Cam Member 18 Rotating Shaft

Claims (2)

[Claims] 1. A lock mechanism comprising a braking piece that contacts a wheel, an operating rod for pressing the braking piece against the wheel, and a cam member for pressing the operating rod against a spring force. In a caster such as a bed provided, a stepping operation means is attached to the rotating shaft of the cam member of one of the casters, and an operating arm is attached to the rotating shaft of the cam member of each caster to interlock these operating arms with each other. A lock operation plate is rotatably attached to one of the casters on a rotation shaft of a cam member about one point, and the lock operation plate is rotated on the lock operation plate. And an electric operation mechanism for rotating and displacing the lock operation plate is connected to the operating arm while the engaging pin for contacting the operating arm to interlock the operating arm is connected. Lock operation mechanism interlocked with the computer. 2. The electric operating mechanism according to claim 1, wherein one end of the interlocking rod is attached to the lock operating plate, and the other end of the interlocking rod is attached to one point of the circumferential portion of the rotating member. A caster interlocking lock operation mechanism for both electric and manual use, which is configured to be connected to the output shaft of the motor.